package com.itheima.mapper;

import com.itheima.pojo.Emp;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.time.LocalDate;
import java.util.List;

/**
 * 员工管理
 */
@Mapper
public interface EmpMapper {
    /**
     * 查询总记录数
     * @return
     */
    @Select("Select count(*) from emp")
    public Long count();

    //传统分页查询
//    @Select("select * from emp limit #{start},#{pageSize}")
//    public List<Emp> page(Integer start, Integer pageSize);
    // pagehelper插件查询方式

//    public List<Emp> list();

    public List<Emp> list(String name, Short gender, LocalDate begin, LocalDate end);

    void delete(List<Integer> ids);

    void insert(Emp emp);

    @Select("select * from emp where id=#{id}")
    Emp getById(Integer id);

    void update(Emp emp);

    @Select("select * from emp where username=#{username} and password=#{password}")
    Emp login(Emp emp);

    /**
     * 根据部门ID删除该部门下的员工数据
     * @param deptId
     */
    @Delete("delete from emp where dept_id=#{deptId}")
    void deleteDeptById(Integer deptId);
}
